Are you sure that perhaps played the song just for the commercial instead of being the opening song (theme) each week. Here is a link to a trailer for the show and EPP wasn't played. http://tv.msn.com/tv/series/private-practice

A couple of years ago the TV ad for "Peter Pan" played Coldplay's "Clocks" during the flying sequence. Having been dragged by my nephew to see the movie at the theatre, a different piece of incidental music was used instead. Funny thing was "Clocks" actually would have actually worked better.